Granted Patent
Utility
US 4,608,405 · App. 06/730,906
Aqueous based epoxy resin curing agents
Inventor:
William J. DeGooyer
Patented Case
View Patent ↗
Granted: Aug 26, 1986
Filed: May 6, 1985
Inventor
William J. DeGooyer
Assignee (at issue)
Celanese GmbH
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.